Radio wave receiving apparatus

ABSTRACT

An object is to provide a radio wave receiver capable of enhancing user-friendliness regarding a display of intensity of a received radio wave in a configuration capable of utilizing two different kinds of radio waves.  
     Each radio wave processing portion  1, 2  receives a radio wave, and outputs various kinds of information such as video information (video signal, video data), audio information (audio signal, audio data), and another information (location information, etc.). A switching portion  4  inputs output signals of the first, and second radio wave processing portions  1, 2 , selects the output signals according to a switching instruction of a controller  3 , and supplies the output signals to a display portion  6  and a speaker  7 . In obtaining a power voltage value indicating intensity (intensity of received electrical fields) of received radio waves from each tuner  11, 21 , the controller  3  controls a display of the intensity of the received radio waves in both tuners, even if the controller  3  processes the radio wave of one, or both the tuners, and controls a display of the intensity of the received radio waves by switching the intensity of the radio waves received in both tuners based on an operation of an operating portion  5  by a user.

TECHNICAL FIELD

The present invention relates to a radio wave receiving apparatus forreceiving two different radio waves.

BACKGROUND ART

From the past, intensity of a received radio wave (also referred to as areception level, an antenna level, etc.) is displayed on a liquidcrystal display portion, etc., in an electronics apparatus such as aportable telephone, etc. (see Japanese Patent Laying-open H11-150765).Furthermore, due to a reason that a reception processing circuit isdownsized and performs very highly in recent years, it becomes possibleto provide an apparatus capable of receiving two different kinds ofradio waves. In such the apparatus, too, it is possible to display theintensity of the received radio wave on the liquid crystal displayportion, etc.

DESCRIPTION OF THE INVENTION Problems To Be Solved By The Invention

However, in the conventional apparatus, the intensity of the receivedradio wave, which is a subject to be processed (a received radio wave ina first operation mode, for example), in use for outputting audio, forexample, is displayed on the liquid crystal display portion, etc., outof the two different kinds of the radio waves. Therefore, it is neededto switch the operation mode in order to know the intensity of the otherreceived radio wave (a received radio wave in a second operation mode),and thus, the conventional apparatus lacks user-friendliness.

In view of the above circumstance, an object of the present invention isto provide a radio wave receiving apparatus configured to be capable ofutilizing two different kinds of radio waves and capable of enhancinguser-friendliness regarding a display of intensity of the received radiowaves.

Means for Solving the Problems

In order to solve the above-described problem, a radio wave receivingapparatus of the present invention is a radio wave receiving apparatusprovided with a first radio wave receiving portion and a second radiowave receiving portion, and receiving two different radio waves, andcomprises a means for obtaining information indicating intensity ofreceived radio waves from each radio wave receiving portion, a displayfor displaying the intensity of the received radio waves, a means forgenerating display information applied to the display based on theinformation indicating the intensity, and a controller for switching,based on an user operation, between a display of the intensity of thereceived radio wave of the radio wave receiving portions receiving aradio wave, which is a subject to be processed, and a display of theintensity of the received radio wave of the radio wave receiving portionreceiving a radio wave, which is a subject not to be processed.

According to the above configuration, it is possible for a user to knowthe intensity of the preferred received radio wave, whether the receivedradio wave is a subject to be processed or a subject not to beprocessed.

A radio wave receiving apparatus is a radio wave receiving apparatusprovided with a first radio wave receiving portion and a second radiowave receiving portion, and receiving two different radio waves, andcomprises a means for obtaining information indicating intensity ofreceived radio waves from each radio wave receiving portion, a displayfor display intensity of the two received radio waves at the same time,and a means for generating two pieces of display information applied tothe display based on information indicating intensity of the bothreceived radio waves of the radio wave receiving portion receiving aradio wave, which is a subject to be processed, and the radio wavereceiving portion receiving a radio wave, which is a subject not to beprocessed.

According to the above-described configuration, it is possible for auser to know the intensity of the both received radio waves, whether thereceived radio wave is a subject to be processed or a subject not to beprocessed.

Furthermore, a radio wave receiving apparatus of the present inventionis a radio wave receiving apparatus provided with a first radio wavereceiving portion and a second radio wave receiving portion, andreceiving two different radio waves, and comprises a means for obtaininginformation indicating intensity of received radio waves from each radiowave receiving portion, a display capable of forming a display stateshowing the intensity of two received radio waves at the same time, anda display state showing the intensity of one received radio wave, ameans for generating display information applied to the display based onthe information indicating the intensity, and a controller forswitching, based on a user operation, among a first display modeindicating intensity of the received radio wave of the radio wavereceiving portion receiving a radio wave, which is a subject to beprocessed, a second display mode indicating intensity of the receivedradio wave of the radio wave receiving portion receiving a radio wave,which is a subject not to be processed, and a third display modeindicating intensity of the both received radio waves.

According to the above-described configuration, it is possible for auser to know the intensity of the preferred received radio wave, whetherthe received radio wave is a subject to be processed or a subject not tobe processed, and in addition, it is also possible for the user to knowintensity of the both received radio waves at the same time.

The display indicating the intensity of the received radio waves may beperformed by using pictographic characters. Furthermore, there may be adifference in color between the pictographic characters indicating theintensity of the radio wave of the radio wave receiving portionreceiving the radio wave, which is a subject to be processed, and thepictographic characters indicating the intensity of the radio wave ofthe radio wave receiving portion receiving the radio wave, which is asubject not to be processed. In addition, there may be a difference inshape between the pictographic characters indicating the intensity ofthe radio wave of the radio wave receiving portion receiving the radiowave, which is a subject to be processed, and the pictographiccharacters indicating the intensity of the radio wave of the radio wavereceiving portion receiving the radio wave, which is a subject not to beprocessed.

Effect of the Invention

As described above, according to the present invention, it is possibleto enhance user-friendliness regarding a display of the intensity of thereceived radio waves in a configuration capable of utilizing twodifferent radio waves.

Best Mode for Practicing the Invention

Hereinafter, an embodiment of the present invention will be describedbased on FIG. 1 to FIG. 8.

FIG. 1 is a block diagram showing a configuration of a radio wavereceiving apparatus 1 of this embodiment. Although FIG. 1 shows aconfiguration in which a first antenna 1A and a second antenna 2A areprovided, it may be configured such that one antenna commonly used fortwo radio waves is provided. A first radio wave processing portion 1 isformed of a first tuner 11 and a first signal processing portion 12. Inaddition, a second radio wave processing portion 2 is formed of a secondtuner 21 and a second signal processing portion 22. Each radio waveprocessing portion 1, 2 receives a radio wave, and outputs various kindsof information such as video information (video signal, video data),audio information (audio signal, audio data), and another information(location information, etc). In this embodiment, the radio wave may meana portable telephone-use radio wave, a PHS-use radio wave, atransceiver-use radio wave, an analog radio broadcasting radio wave, adigital radio broadcasting radio wave, an analog TV broadcasting radiowave, a digital TV broadcasting (e.g., CS broadcasting, BS broadcasting,a terrestrial digital broadcasting) radio wave, a GPS (globalpositioning system)-use radio wave, a wireless LAN-use radio wave, etc.

A switching portion 4 inputs output signals of the first and secondradio wave processing portions 1, 2, selects the output signalsaccording to a switching instruction from a controller 3, and applies aselected signal to a display portion (a liquid crystal panel, etc., forexample) 6 or a speaker 7. Hereinafter, an operation state in which thesignal output from the first radio wave processing portion 1 is asubject to be processed is referred to as a first operation mode, and anoperation state in which the signal output from the second radio waveprocessing portion 2 is a subject to be processed is referred to as asecond operation mode.

As shown in FIG. 2, an operating portion 5 is provided with variouskinds of keys. In this embodiment, an “operation mode switching” key andan “antenna display mode switching” key are provided. The operation modeswitching is to switch between the above-described first operation modeand the second operation mode, and the controller 3 executes a modeswitching process (controlling of the switching portion 4, and soforth)-as a result of detecting that the keys are operated. The antennadisplay mode switching will be described later.

In addition to an entire control in the radio wave receiving apparatus,the controller 3 executes a process for visibly displaying intensity ofa received radio wave as described below as the control described in thepresent invention. The controller 3 obtains from each tuner 11, 21 avoltage value indicating the intensity of the received radio waves(electric fields intensity of received radio) so as to carry out acomparing process among a first threshold value, a second thresholdvalue, and a third threshold value, for example. When the power voltagevalue is larger than the first threshold value, the controller 3determines that the received radio wave is “strong”, when the powervoltage value is larger than the second threshold value and smaller thanthe first threshold value, the controller 3 determines that the receivedradio wave is “middle”, when the power voltage value is larger than thethird threshold value and smaller than the second threshold value, thecontroller 3 determines that the received radio wave is “weak”, and whenthe power voltage value is smaller than the third threshold value, thecontroller 3 determines that the radio wave travels “out of range”. Thisdetermination process is executed at certain intervals. In addition,based on a result of the above-described determination process, thecontroller 3 generates a segment ON signal. In the display portion 6, asshown in FIG. 2, a received radio wave intensity display portion 6 aformed of liquid crystal is provided. The received radio wave intensitydisplay portion 6 a is formed of an inverted triangle segmentrepresenting an antenna, and three bar-shaped segments each of whichdiffers in height. When it is determined that the received radio wave is“strong”, the controller 3 applies to the received radio wave intensitydisplay portion 6 a a signal for turning on the three bar-shapedsegments. Similarly, when it is determined that the received radio waveis “middle”, the controller 3 applies to the received radio waveintensity display portion 6 a a signal for turning on the two bar-shapedsegments, and when it is determined that the received radio wave is“weak”, the controller 3 applies to the received radio wave intensitydisplay portion 6 a a signal for turning on the one bar-shaped segment.

In FIG. 3, display manners in each display mode in the received radiowave intensity display portion 6 a are shown. A first display mode shownin a portion (a) in FIG. 3 is a mode for showing in a first displaylocation the intensity of the received radio wave of the tuner in use (,which refers to the first tuner 11 in the first operation mode, and tothe second tuner 21 in the second operation mode), a second display modeshown in a portion (b) in FIG. 3 is a mode for showing in the firstdisplay location the intensity of the received radio wave of the tunernot in use (, which refers to the second tuner 21 in the first operationmode, and to the first tuner 11 in the second operation mode), and athird display mode shown in a portion (c) in FIG. 3 is a mode forshowing in the first display location the intensity of the receivedradio wave of the tuner in use and in a second display location theintensity of the received radio wave of the tuner not in use. Thecontroller 3 detects an operation of the “antenna display modeswitching” key, and switches the display modes one after the other. Itis noted that in the above example, it is attempted to distinguishbetween the first display mode and the second display mode by changingcolors (by turning on/off the liquid crystal display) of the invertedtriangle-shaped segment in the first display location. However, inaddition thereto, it is also possible to attempt to distinguish the twodisplay modes according to a difference in shape of the segment, thatis, a triangle-shaped segment that is turned on and off is provided, andthe two display modes are distinguished as a result of the shape of thesegment being rendered different.

Next, a process for displaying the intensity of the received radio wavesin the tuners 11, 21 will be described based on flowcharts from FIG. 4to FIG. 8.

When a power supply is turned on, the controller 3 carries outinitializing processes such as clearing a memory (not shown),initializing the first and second radio wave processing portions 1, 2,and the display portion 6 (step S1). Then, the controller 3 causes eachtuner 11, 21 to execute radio wave receiving processes (step S2), and inaddition, causes each signal processing portion 12, 22 to execute signalprocesses (step S3). As a result of such the processes, a radio wave ofa certain frequency is received, and a demodulating process (regarding adigitally modulated signal, a further decoding process, etc., arecarried out), etc., are executed. As a consequence, a contenttransmitted by the radio wave is retrieved, and as a result, a videodisplay and an audio output are carried out.

The controller 3 sets an operation mode to the first operation mode(step S4), and sets an antenna display mode to the first antenna displaymode (step S5). Then, the controller 3 applies a switch instruction tothe switching portion 4 so as to allow the switching portion 4 to form asignal outputting state corresponding to the operation mode (step S6).It is noted that in the first operation mode, an output of the firstradio wave processing portion 1 is to be selected in the switchingportion 4, and in the second operation mode, an output of the secondradio wave processing portion 2 is to be selected in the switchingportion 4. Furthermore, the controller 3 carries out according to theantenna display mode a determination process of the intensity of thereceived radio waves in the first or second tuner, or in the bothtuners, and outputs the segment ON signal to the received radio waveintensity display portion 6 a based on the determination result (stepS7).

In addition, the controller 3 observes a signal from a key inputtingportion 5 (step S8), and in a case that there is no key input (NO in astep S9), the controller 3 determines whether or not a previously setdetermination time-period interval of the intensity of the receivedradio wave (antenna level) elapses (step S110). When it is determinedthat the determination time-period interval elapses, the controller 3returns to the step S7 so as to display the antenna level once again.When it is determined that the determination time-period interval of theantenna level has not elapsed, the controller 3 returns to the step S8so as to observe whether or not there is a new key input.

On the other hand, in a case that there is the key input (YES in thestep S9), the controller 3 carries out a determination for understandingwhat kinds of the keys are input (step S12). In a case that the inputkey is the antenna display mode switching key, the controller 3 carriesout a process for adding one to a state value in the antenna displaymode (step S13). The controller 3 sets the antenna display mode based onthis adding result, and returns to the step S7. It is noted the statevalues as a result of the addition are within a range of 0, 1, 2, andwhen the state values as a result of the addition is equal to or morethan 3, the state value is converted into 0 (zero). It is noted that thestate value 0 (zero) indicates the first antenna display mode, the statevalue 1 indicates the second antenna display mode, and the state value 2indicates the third antenna display mode. When the key input in the stepS12 is the operation mode switching key, the controller 3 determineswhether or not a current operation mode is the first operation mode(step S16). When the current operation mode is the first operation mode,the controller 3 sets the operation mode to the second operation mode(step S17). When the current operation mode is the second operationmode, the controller 3 sets the operation mode to the first operationmode (step S18), and returns to the step S6. In addition, when the keyinput in the step S12 is neither the antenna display mode switching keynor the operation mode switching key, the controller 3 carries out aprocess corresponding to the input key (step S19), and returns to thestep S8.

FIG. 6 to FIG. 8 are flowcharts showing an antenna level display processin the step S7 in FIG. 4. The controller 3 determines whether or not theantenna display mode is the first display mode (step S21), and when theantenna display mode is the first antenna display mode, the controller 3determines the current operation mode (step S22). When it is determinedthat the current operation mode is the first operation mode, thecontroller 3 carries out a determination process of the intensity of thereceived radio wave of the first tuner 11 (step S23), and when it isdetermined that the current operation mode is the second operation mode,the controller 3 carries out a determination process of the intensity ofthe received radio wave of the second tuner 21 (step S24). Furthermore,the controller 3 sets a color of an icon (segment) in an antenna shapein the first display location of the received radio wave intensitydisplay portion 6 a to a first color (see the portion (a) in FIG. 3),and applies to the received radio wave intensity display portion 6 a thesegment ON signal based on the determination result (step S25).

On the other hand, when it is determined that the antenna display modeis not the first display mode in the step S21, the controller 3determines whether or not the antenna display mode is the second antennadisplay mode (step S26), and when it is determined that the antennadisplay mode is the second antenna display mode, the controller 3determines the current operation mode (step S27). When it is determinedthat the current operation mode is the first operation mode, thecontroller 3 carries out a determination process of the intensity of thereceived radio wave of the second tuner 21 (step S28), and when it isdetermined that the current operation mode is the second operation mode,the controller 3 carries out a determination process of the intensity ofthe received radio wave of the first tuner 11 (step S29). Then, thecontroller 3 sets the color of the icon in an antenna shape in the firstdisplay location of the received radio wave intensity display portion 6a to a second color (see the portion.(b) in FIG. 3), and applies to thereceived radio wave intensity display portion 6 a the segment ON signalbased on the determination result (step S30).

In addition, when it is determined that the antenna display mode is notthe second display mode in the step S26, the controller 3 determines thecurrent display mode (step S31). When it is determined that the currentoperation mode is the first operation mode, the controller 3 carries outa determination process of the intensity of the received radio wave ofthe first tuner 11 (step S32), and when it is determined that thecurrent operation mode is the second operation mode, the controller 3carries out a determination process of the intensity of the receivedradio wave of the second tuner (step S33). Then, the controller 3 setsthe color of the icon in an antenna shape in the first display locationof the received radio wave intensity display portion 6 a to the firstcolor (see the portion (c) in FIG. 3), and applies to the received radiowave intensity display portion 6 a the segment ON signal based on thedetermination result (step S34). Furthermore, the current operation modeis determined (step S35), and when it is determined that the currentoperation mode is the first operation mode, the controller 3 carries outa determination process of the intensity of the received radio wave ofthe second tuner (step S36), and when it is determined that the currentoperation mode is the second operation mode, the controller 3 carriesout a determination process of the intensity of the received radio waveof the first tuner (step S37). Then, the controller 3 sets the color ofthe icon in an antenna shape in the second display location of thereceived radio wave intensity display portion 6 a to the second color(see the portion (c) in FIG. 3), and applies to the received radio waveintensity display portion 6 a the segment ON signal based on thedetermination result (step S38).

As described above, according to this embodiment, it is possible for auser to know the intensity of the preferred received radio wave, whetherthe received radio wave is a subject to be processed or a subject not tobe processed. In addition, it is also possible for the user to know atthe same time the intensity of the both received radio waves.

BRIEF DESCRIPTIONS OF THE INVENTION

FIG. 1 is a block diagram showing a configuration of a radio wavereceiving apparatus of an embodiment of the present invention;

Portions (a), (b), and (c) of FIG. 2 are descriptive diagrams each ofwhich shows a display state in each antenna level display mode;

FIG. 3 is a plane view showing an outline of the radio wave receivingapparatus of an embodiment of the present invention;

FIG. 4 is a flowchart showing a process content of a control portion;

FIG. 5 is a flowchart showing a process content of the control portion;

FIG. 6 is a flowchart showing a process content of the control portion;

FIG. 7 is a flowchart showing a process content of the control portion;and

FIG. 8 is a flowchart showing a process content of the control portion.

1. A radio wave receiving apparatus provided with a first radio wavereceiving portion and a second radio wave receiving portion, andreceiving two different radio waves, comprising: a means for obtaininginformation indicating intensity of received radio waves from each radiowave receiving portion; a display for executing a display indicating theintensity of the received radio waves; a means for generating displayinformation applied to the display based on the information indicatingthe intensity; and a controller for switching, based on an useroperation, between a display of the intensity of the received radio waveof the radio wave receiving portions receiving a radio wave, which is asubject to be processed, and a display of the intensity of the receivedradio wave of the radio wave receiving portion receiving a radio wave,which is a subject not to be processed.
 2. A radio wave receivingapparatus provided with a first radio wave receiving portion and asecond radio wave receiving portion, and receiving two different radiowaves, comprising: a means for obtaining information indicatingintensity of received radio waves from each radio wave receivingportion; a display for executing a display indicating intensity of thetwo received radio waves at the same time; and a means for generatingtwo pieces of display information applied to the display based oninformation indicating intensity of the both received radio waves of theradio wave receiving portion receiving a radio wave, which is a subjectto be processed, and the radio wave receiving portion receiving a radiowave, which is a subject not to be processed.
 3. A radio wave receivingapparatus provided with a first radio wave receiving portion and asecond radio wave receiving portion, and receiving two different radiowaves, comprising: a means for obtaining information indicatingintensity of received radio waves from each radio wave receivingportion; a display capable of forming a display state showing theintensity of two received radio waves at the same time, and a displaystate showing the intensity of one received radio wave; a means forgenerating display information applied to the display based on theinformation indicating the intensity; and a controller for switching,based on a user operation, among a first display mode indicatingintensity of the received radio wave of the radio wave receiving portionreceiving a radio wave, which is a subject to be processed, a seconddisplay mode indicating intensity of the received radio wave of theradio wave receiving portion receiving a radio wave, which is a subjectnot to be processed, and a third display mode indicating intensity ofthe both received radio waves.
 4. A radio wave receiving apparatusaccording to any one of claims 1 to 3, wherein the display indicatingthe intensity of the received radio waves is performed by usingpictographic characters.
 5. A radio wave receiving apparatus accordingto claim 4, wherein there is a difference in color between thepictographic characters indicating the intensity of the radio wave ofthe radio wave receiving portion receiving the radio wave, which is asubject to be processed, and the pictographic characters indicating theintensity of the radio wave of the radio wave receiving portionreceiving the radio wave, which is a subject not to be processed.
 6. Aradio wave receiving apparatus according to claim 4, wherein there is adifference in shape between the pictographic characters indicating theintensity of the radio wave of the radio wave receiving portionreceiving the radio wave, which is a subject to be processed, and thepictographic characters indicating the intensity of the radio wave ofthe radio wave receiving portion receiving the radio wave, which is asubject not to be processed.